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//! Query executor

use std::{fmt, sync::Arc};

use async_trait::async_trait;
use table_engine::stream::SendableRecordBatchStream;

use crate::{context::Context, error::*, physical_planner::PhysicalPlanRef};

/// Query executor
///
/// Executes the logical plan
#[async_trait]
pub trait Executor: fmt::Debug + Send + Sync + 'static {
    /// Execute the query, return the record batch stream
    ///
    /// REQUIRE: The meta data of tables in query should be found from
    /// ContextRef
    async fn execute(
        &self,
        ctx: &Context,
        physical_plan: PhysicalPlanRef,
    ) -> Result<SendableRecordBatchStream>;
}

pub type ExecutorRef = Arc<dyn Executor>;
